

package com.hazelcast.internal.management.operation;

import com.hazelcast.cluster.ClusterState;
import com.hazelcast.internal.management.ManagementCenterService;
import com.hazelcast.internal.management.ManagementDataSerializerHook;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.spi.impl.AllowedDuringPassiveState;
import com.hazelcast.spi.impl.executionservice.ExecutionService;

import java.io.IOException;
import java.util.concurrent.Future;

import static com.hazelcast.internal.util.ConcurrencyUtil.CALLER_RUNS;
import static com.hazelcast.internal.util.ExceptionUtil.peel;
import static com.hazelcast.internal.util.ExceptionUtil.withTryCatch;

/**
 * Operation to change a cluster's state via Management Center.
 */
public class ChangeClusterStateOperation extends AbstractManagementOperation implements AllowedDuringPassiveState {
    private ClusterState newState;

    public ChangeClusterStateOperation() {
    }

    public ChangeClusterStateOperation(ClusterState newState) {
        this.newState = newState;
    }

    @Override
    public void run() {
        ILogger logger = getNodeEngine().getLogger(getClass());
        ExecutionService executionService = getNodeEngine().getExecutionService();
        Future<Void> future = executionService.submit(ExecutionService.ASYNC_EXECUTOR, () -> {
            getNodeEngine().getClusterService().changeClusterState(newState);
            return null;
        });

        executionService.asCompletableFuture(future).whenCompleteAsync(withTryCatch(logger, (empty, error) -> sendResponse(error != null ? peel(error) : null)), CALLER_RUNS);
    }

    @Override
    public final Object getResponse() {
        throw new UnsupportedOperationException();
    }

    @Override
    public String getServiceName() {
        return ManagementCenterService.SERVICE_NAME;
    }

    @Override
    public boolean returnsResponse() {
        return false;
    }

    @Override
    protected void writeInternal(ObjectDataOutput out) throws IOException {
        out.writeObject(newState);
    }

    @Override
    protected void readInternal(ObjectDataInput in) throws IOException {
        newState = in.readObject();
    }

    @Override
    public int getClassId() {
        return ManagementDataSerializerHook.CHANGE_CLUSTER_STATE;
    }
}
